Display, display system, image projection system, and movable object

Abstract

Provided is a head-up display including a liquid-crystal panel including a display screen, a Fresnel lens which is on an opposite side of the liquid-crystal panel from the display screen, a light-diffusion structure between the liquid-crystal panel and the Fresnel lens, a backlight that emits light toward the light-transmissive member, and a mirror that forms a virtual image corresponding to an image displayed on the display screen of the liquid-crystal panel, in a target space, where the light-diffusion structure includes a plurality of fine particles and an average particle size of the plurality of fine particles is equal to or smaller than 20 um.

What is claimed is: 
     
       1. A head-up display comprising: a liquid-crystal panel including a display screen; a Fresnel lens which is on an opposite side of the liquid-crystal panel from the display screen; a light-diffusion structure disposed below the liquid-crystal panel and above the Fresnel lens; a backlight that emits light toward a light-transmissive member; and a mirror that forms a virtual image corresponding to an image displayed on the display screen of the liquid-crystal panel, in a target space, wherein the light-diffusion structure includes a plurality of fine particles; and an average particle size of the plurality of fine particles is equal to or smaller than 20 μm. 
     
     
       2. The head-up display according to  claim 1 , wherein
 the light-diffusion structure is included in a light-diffusion member; and 
 the light-diffusion member has a transmittance equal to or larger than 70%. 
 
     
     
       3. The head-up display according to  claim 1 , wherein
 the light-diffusion structure is included in a light-diffusion member; and 
 the light-diffusion member has a thickness equal to or smaller than 300 μm. 
 
     
     
       4. The head-up display according to  claim 1 , wherein
 the Fresnel lens directly contacts the light-diffusion member. 
 
     
     
       5. The head-up display according to  claim 1 , wherein
 an uneven surface of the Fresnel lens is on the backlight side. 
 
     
     
       6. The head-up display according to  claim 1 , wherein
 a length of the liquid-crystal panel in a longitudinal direction is longer than a length of the Fresnel lens in the longitudinal direction. 
 
     
     
       7. The head-up display according to  claim 1 , wherein
 the light-diffusion structure is provided to a surface of a light-diffusion member facing the liquid-crystal panel. 
 
     
     
       8. The head-up display according to  claim 1 , wherein
 the light-diffusion structure is provided to a surface of a light-diffusion member facing the Fresnel lens. 
 
     
     
       9. The head-up display according to  claim 1 , wherein
 the light-diffusion structure is provided to each of a surface of a light-diffusion member facing the liquid-crystal panel and a surface of the light-diffusion member facing the Fresnel lens. 
 
     
     
       10. The head-up display according to  claim 1 , wherein
 the light-diffusion structure is included in a light-diffusion member; and 
 the light-diffusion member is made of glass or resin. 
 
     
     
       11. The head-up display according to  claim 1 , wherein
 the light-diffusion structure is included in a light-diffusion member; and 
 the light-diffusion member is made of resin in which fine particles are dispersed. 
 
     
     
       12. The head-up display according to  claim 1 , wherein
 light emitted from the backlight diverges in a direction toward the Fresnel lens. 
 
     
     
       13. The head-up display according to  claim 1 , wherein
 light emitted from the backlight converges in a direction toward the Fresnel lens. 
 
     
     
       14. The head-up display according to  claim 1 , wherein
 the backlight includes light emitting diodes or laser diodes. 
 
     
     
       15. The head-up display according to  claim 1  further comprising:
 the light-transmissive member that has light transmission through the light emitted from the backlight and is placed between the backlight and the Fresnel lens; and 
 a body part accommodating the backlight and the light-transmissive member. 
 
     
     
       16. The head-up display according to  claim 15 , wherein
 the body part has a plurality of plate-shaped fins protruding from an outer surface of the body part in a direction intersecting a direction in which a light-diffusion member and the Fresnel lens are arranged. 
 
     
     
       17. The head-up display according to  claim 15 , wherein
 the body part is made of aluminum.